21-19-2

 Bis(5'-guanosyl) tetraphosphate

C₂₀H₂₈N₁₀O₂₁P₄

23-13-2

 (2E,6E,10E,14E,18E,22E,26E,30E,34E,38E)-3,7,11,15,19,23,27,31,35,39,43-undecametiltetraconta-2,6,10,14,18,22,26,30,34,38,42-undecaeno-1-ilo trihidrogenodifosfato

C₅₅H₉₂O₇P₂

28-18-2

 Aluminium Oxide

28-99-9

 2,6-di-terc-butil-4-(3-hidroxi-2,2-dimetilpropil)fenol

C₁₉H₃₂O₂

200-06-6

 1H-Dibenz[de,h]isoquinoline (8CI,9CI)

200-23-7

 Benzo(k l)xanteno

C₁₆H₁₀O

200-93-1

 9H-Acenaphth[4,5-d]imidazole

C₁₃H₈N₂

200-98-6

 Acenaphtho[5,4-d]thiazole

C₁₃H₇NS

201-06-9

 acephenanthrylene

C₁₆H₁₀

201-20-7

 Pyrrolo[3,2,1-de]phenanthridinium

C₁₅H₁₀N

201-42-3

 13H-benzo[k]cyclopenta[pqr]tetraphene

C₂₃H₁₄

201-48-9

 13H-Dinaphtho[1,8-4,5,6:1',8'-5,6,7]phenanthro[4',5':4,5,6,7]indeno[2,1-c]pyridine

C₂₂H₁₃N

201-65-0

 13H-indeno[1,2-l]fenantreno

C₂₁H₁₄

201-68-3

 Benzo[b]phenanthro[9,10-d]furan

C₂₀H₁₂O